8 892214e 13 9 121355e 12 correct answer 4 m version

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8. 8.92214e-13 9. 1.84225e-12 10. 1.21355e-12
Correct answer: 4 . 08539 × 10 12 m.
Version 064 – mid3 58010 Fall14 – yeazell – (58010) 3 Explanation: the de Broglie wavelength is, λ = h/p = h/ ( m p v ) λ = 6 . 63 × 10 34 J · s / (1 . 67 × 10 27 kg)(97176 . 9 m / s) λ = 4 . 08539 × 10 12 m 006 10.0points keywords: 007 10.0points What is the uncertainty in the speed of a proton if it is desired to locate its position to within an uncertainty of x = 4 . 95 nm ? At x = L 9 , P = 2 L parenleftBig sin 2 π 9 parenrightBig 0 . 006 L = 0 . 00140373 .
Version 064 – mid3 58010 Fall14 – yeazell – (58010) 4 008 10.0points Can two different elements contain the same number of protons or neutrons? 1. neither the same number of neutrons nor of protons 2. the same number of neutrons but not the same number of protons correct 3. the same number of both neutrons and protons 4. the same number of protons but not the same number of neutrons Explanation: Two different elements can contain the same number of neutrons but can’t contain the same number of protons. The number of protons in an atomic nucleus defines the ele- ment. Nuclei of an element can have different

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